Poco F8 Ultra vs Y400 4G

Side-by-side comparison with real-scale visuals and detailed specifications

100% Objective Comparisons — Data sourced from official manufacturers

See our methodology

100%

Poco F8 Ultra is 0.6% taller

Poco F8 Ultra

163.1mm×76.1mm

Y400 4G

164.1mm×75.6mm

Scaled to real proportions

Specifications Comparison

Poco F8 Ultra

Xiaomi

5 wins

Y400 4G

vivo

3 wins

📱

Screen Size

Diagonal screen measurement

Better

Poco F8 Ultra

6.7"

Y400 4G

6.67"

Difference: 0.03" (0.4% more)

🔋

Battery

Battery capacity in milliamp-hours

Better

Poco F8 Ultra

5,160mAh

Y400 4G

5,000mAh

Difference: 160mAh (3.2% more)

💾

RAM

Random Access Memory for multitasking

Better

Poco F8 Ultra

12GB

Y400 4G

4GB

Difference: 8GB (200.0% more)

⚖️

Weight

Total device weight

Better

Poco F8 Ultra

206g

Y400 4G

193g

Difference: 13g (6.7% less)

💿

Storage

Internal storage capacity

Better

Poco F8 Ultra

256GB

Y400 4G

128GB

Difference: 128GB (100.0% more)

📷

Main Camera

Main camera resolution

Better

Poco F8 Ultra

108MP

Y400 4G

50MP

Difference: 58MP (116.0% more)

💰

Price

Retail price in USD

Better

Poco F8 Ultra

749$

Y400 4G

199$

Difference: 550$ (276.4% less)

📏

Height

Device height

Poco F8 Ultra

163.1mm

Y400 4G

164.1mm

📐

Width

Device width

Poco F8 Ultra

76.1mm

Y400 4G

75.6mm

📦

Thickness

Device thickness/depth

Better

Poco F8 Ultra

8.8mm

Y400 4G

8.5mm

Difference: 0.3mm (3.5% less)

Poco F8 Ultra

Y400 4G

Winner in category

Last updated: March 23, 2026

Source: Official Source

Last updated: March 23, 2026

Source: Official Source

Why Trust Our Comparisons

Verified Data

All specs verified from official sources

No Affiliate Bias

We don't earn from product sales

Regularly Updated

Data refreshed when specs change

Transparent Method

Our comparison methodology is public

SizeVS Editorial Team

Verified

Product Comparison Specialists

Our team of tech enthusiasts and data analysts work to provide accurate, unbiased product comparisons.

Verified Data Sources Editorial Standards

Updated: March 24, 2026

Our methodology

Explore this matchup

View Poco F8 Ultra View Y400 4G Screen Size Battery RAM Weight Storage

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